"What do you know about our product?"
"Do you know what our team is making?"

This is another type of question they ask to find out what you know so they don't tell you something that you already know. If it is an existing product, then you should definitely know what it is. If not, and after you researched as much as you could, tell them the little that you know. For example, I interviewed for a group within Microsoft that was very new. I had no idea what the team was creating but I was interested because it was a new technology. I found out as much as I could and when they asked me this question, this is how I answer.

"There isn't much information about your products yet, but I heard you are creating new technology to create a more secure database. I worked with databases most of my career and the thought of more security really interested me."

"I heard this company is creating a camera lens for deep sea photography. Because my major was in engineering and my hobby is in photography, I believe this is the perfect position for me."

"I hear this group has several functions. It has an incubation team that grows new ideas and if the product has potential a new product is formed. I also hear this group creates solutions for companies to entice them to buy more Microsoft products."

I didn't know much, but after researching, this is all I could find. This is exactly what I said and they responded by telling me more detail. It wasn't wrong, but at least I said enough about the group to sound like I researched a little bit. That's basically all you have to do for this question.